LED2472GQTR datasheet(30/39 Pages) STMICROELECTRONICS

No de pièce	LED2472GQTR

Description	24-channels LED driver with error detection and gain control

PDF	39 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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30 / 39 page

Thermal shutdown and thermal alert

LED2472G

30/39

DocID024620 Rev 3

Thermal shutdown and thermal alert

The device can monitor the internal temperature. Based on the temperature value, the

device can simply provide an alert (if the temperature exceeds 150 °C) through the serial

interface, or trigger a thermal shutdown (if the temperature exceeds 170 °C). The effect of

the thermal shutdown is to turn off all channels until the temperature falls (considering a

hysteresis of around 15 °C). The thermal alert can be read by running the digital key

“Thermal alert reading”, holding the LE high for 14 CLK rising edges (see Figure 17). If

thermal alert is asserted, a 24-bit string at “1” will be sent through SDO at the next 24 CLK

rising edge.

Figure 17. LE high for 14 CLK

Table 13. Thermal alert status summary

Thermal alert status

Meaning

“0000 0000 0000 0000 0000 0000”

Device temperature under 150 °C

“1111 1111 1111 1111 1111 1111”

Device temperature over 150 °C

LED2472GQTR Fiches technique(PDF) 30 Page - STMicroelectronics